Dipper-tooth.



I. O'F. CLARK, In. DIFFER TOOTH. APPLICATION m2o Aus.25. 1913.

Patented Mar. 21, 1916.

tty

UMD PATENT carica.

JOHN 0FA-LLON CLARK, JR., OF ST, LOUIS, MISSOURI, ASSIGNOR TO AMERICANMAN- GANESE STEEL COMPANY, OF AUGUSTA, MAINE, A CORPORATION 0F MAINE.

DIPPER-TOOTH.

Specification of Letters Yatent.

Patented Mar. 21, 1916.

Application tiled August 25, 1913. Serial No. 786,358.

Missouri, have made and invented certain new and useful Improvements inDipper- Teeth, of which the following is a specification.

My invention relates to teeth designed for use with'the dippers orbuckets of excavating, dredging, digging, and similar mal chines,andparticularly to that kind or class of teeth in Which'a permanentsupporting member or base s provided to the end of which a detachabletooth point may be secured, so that when the point becomes worn out inservice it may be replaced by a new 'point and.without discarding thebase porferred to, and an improved construction of base adapted to-support the detachable.

tion of the tooth. y

The object of my invention is to provide an improved construction ofdetachable and renewable tooth point ofthe type above repoint, all ashereinafter described at length and claimed in the concluding claims.

The vdrawing accompanying and forming a part of this applicationillustrates the preferred embodiment of my invention, although it willbe understood that my invention includes such variations andmodiications of the particular tooth point and base illustrated as willbe obvious to those skilled in the art to which my invention relates.

portion of my improved dipper tooth, thev same being commonly secured tothe inner face of a dipper body and having a recess 5 designed to titover the edge or lip of the dipper and a jaw 6 which extends a shortdistance along the outer surface and toward the bottom of the dipperbody, although these features are not involved in my invention.

The outer or free end of-the base of my improved tooth 'is so sha ed asto provide:

two inclined seats 7, whic merge with one another and form a triangularpoint support to which the detachable and renewable point 8 of the toothis secured and from which support it may be readily removed when wornout, and an unworn point sub stituted therefor, thus renderinfg'itunnecessary to renew the base when the point has been worn to such anextent as to be unserviceable. While the point support is referred toherein as triangular in form it will be seen that it departs from a truetriangle in that its apex is rounded, and I use the term in a generalsense to indicate a point support of tapering forni, and intend toinclude a point support in which the seats themselves may be slightlycurved, as is sometimes the case in practice.

The inclined seats 7 are provided each with a centrally locatedlongitudinally extendingJ recess 9 which recessesincrease in depth asthey recede from the apex of the triangular point support, as-shown inFigs.' 1 and 2 of the drawing and which recesses are` separated from oneanother by a longitudinzv extending web 16; and two transverselyextending holes 1() are provided, which holes intersect the recess 9 andare adapted to receive bolts, pins, or similar elements for holding thedetachable point in place as will hereinafter appear.

The detachable point portion of my improved dipper tooth is bifurcatedasshown, to thereby provide two sides or arms 11, the inner surfaces ofwhich arms are inclined to correspond with the inclination of the seatsupon the base and which inner surfaces merge with one another' tothereby provide a triangular opening which lits over the tri-` f angularpoint support of the base hereinbei fore referred to and as will beunderstood from Fig. 1. Each of the arms 11 is provided with a centrallylocated securing lug 12 upon its inner surface and which lugs areprovided each with a hole 13, which holes come opposite the holes 1,0when the point is in place upon the base so that'a pin or bolt may beinserted in the holes to hold the point in place. rlibe lugs 12thusproject toward one another; and they are preferably located adjacentthe rear ends of the arms so that they Willlie adjacent the rearportions of the recesses 9 into which they enter as the point is put inplace by moving it longitudinally along the center line of the base,las,

will be understood, i a

Means are preferably provided for preventing lateral movement of theppint relative to the base; such means being shpwn as con'iprisingeJcentral recess 14 formediin the point at the apex of the triangularopening therein, and a projection 15 formed at the` apex of thetriangular point support of the holes, are such that the point may bere' versed upon the base tothereby secure more uniform wearing away ofthe extremity of the point and of the two arms thereof; al though myinvention is in no way limited to dipper teeth in which the detachablepoint is also reversible. Y

Having thus described and explained my invention, I claim and desire tosecure by Letters Patent; Y

1 -A base for a dipper tooth comprising a body with a forwardlyprojecting point supporting nose, said nose provided with upper andlower rearwardly extending noncommunicating recesses, the transverse webintermediate said recesses providing for the lateral bracing of the noseside walls.

2. A base for a dipper tooth. comprising a body with a. forwardlyprojecting point supporting nose, said nose provided with rearwardlyextending and deepening upper and lower non-communicating recesses withthe bottom walls thereof extending substantially parallel, said recessesdefining a transverse web extending between the nose side `walls andproviding for their lateral bra-cing or reinforcement, said webprojecting beyond the front of said nose.

3. A dipper tooth removable point including rearwardly diverging upperand lower arms, confronting isolated or'separated bolt engageable lugsprojecting from the inner surfaces of said arms, the meeting portions ofsaid arms provided lwith a forwardly exending recess lying directly infront of said ugs.

4. A dipper tooth removable point including rearwardly diverging upperand lower arms, confronting isolated bolt engageable lugs projectingfrom the inner slrfaces' of said arms, the meeting portions of said armsprovided with a forwardly extending recess lying directly in front ofsaid lugs, said lugs "and recess lying in the median/p ne ofgsaid point.5 i

5. A dipper tooth compris" g aibase with a forwardly projecting nose,/'said nose provided with rearwardly ex lding and deepi truding portion ofsaid web, means extend.

ing through and engaging the side walls of said nose, detaehablyengaging said lugs and coacting with the securing means ef.- fected bythe protrusion of said web and the receiving recess Within the sa idpoint for the detachable and rigid securement of said point and base.

G. A base for a dipper tooth comprising a body with a forwardlyprojecting bifurcated nose, a web connected to and extending between theside walls of the nose, said web extending to the bottoni of saidbifurcation and beyond the front extremity of said nose. l

Signed at Chicago in the county of Cook and State of illinois this 16day of August A. D. 19l3.

JOHN OFALLON CLARK, JR.

itnessesz JOSEPH H. HUGHES, GEORGE RUSSELL.

